Segment Reporting - Summary Financial Information by Reporting Segment (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022		Mar. 31, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenue		$ 182,959		$ 183,638
Percentage of total revenue		100.00%		100.00%
Operating Income (Loss)		$ 43,693		$ 40,617
Total Assets	[1]	843,827			$ 847,433
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenue	[2],[3]	$ 279		$ 339
Percentage of total revenue	[2]	0.20%		0.20%
Operating Income (Loss)	[2]	$ (8,856)		$ (6,849)
Total Assets	[1],[2]	552,845			542,954
CTU [Member] | University Group [Member]
Segment Reporting Information [Line Items]
Revenue	[5]	$ 113,148	[4]	$ 105,822
Percentage of total revenue	[5]	61.80%		57.60%
Operating Income (Loss)	[5]	$ 43,026		$ 36,143
Total Assets	[1]	152,252			153,072
AIUS [Member] | University Group [Member]
Segment Reporting Information [Line Items]
Revenue	[7]	$ 69,532	[6]	$ 77,477
Percentage of total revenue	[7]	38.00%		42.20%
Operating Income (Loss)	[7]	$ 9,523		$ 11,323
Total Assets	[1]	$ 138,730			$ 151,407

[1] Total assets do not include intercompany receivable or payable activity between institutions and corporate and investments in subsidiaries.

[2] Corporate and Other includes results of operations and total assets for closed campuses. Revenue recorded within Corporate and Other relates to miscellaneous non-student related revenue.

[3] Revenue recorded within Corporate and Other relates to miscellaneous non-student related revenue.

[4] CTU includes revenue related to the Hippo acquisition commencing on the September 10, 2021 date of acquisition.

[5] CTU results of operations include the Hippo acquisition commencing on the September 10, 2021 date of acquisition.

[6] AIUS includes revenue related to the DigitalCrafts acquisition commencing on the August 2, 2021 date of acquisition.

[7] AIUS results of operations include the DigitalCrafts acquisition commencing on the August 2, 2021 date of acquisition.